1.7 - conservation of energy Flashcards
1
Q
what is the conservation of energy law?
A
energy can be transferred usefully, or dissipated, but can never be created or destroyed.
2
Q
what is dissipated energy?
A
energy that is lost to the surroundings.
3
Q
what is an open system?
A
An open system is one which can gain or lose energy (or matter) to the ‘outside world’
For example, an open beaker.
4
Q
what is a closed system?
A
A closed system is one which cannot gain or lose energy (or matter) to the ‘outside world’
For example, an enclosed and insulated container.wh
5
Q
what is waste energy?
A
waste energy is energy that is not used by the device for its desired purpose - e.g. heat energy given off by a light bulb.
